scholarly journals Layer Morphology and Ink Compatibility of Silver Nanoparticle Inkjet Inks for Near-Infrared Sintering

Nanomaterials ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 892
Author(s):  
Dieter Reenaers ◽  
Wouter Marchal ◽  
Ianto Biesmans ◽  
Philippe Nivelle ◽  
Jan D’Haen ◽  
...  
Keyword(s):  
Silver Nanoparticle ◽  
High Speed ◽  
Processing Time ◽  
Near Infrared ◽  
Printed Electronics ◽  
Low Cost ◽  
Low Complexity ◽  
Post Processing ◽  
Drop On Demand ◽  
Processing Step

The field of printed electronics is rapidly evolving, producing low cost applications with enhanced performances with transparent, stretchable properties and higher reliability. Due to the versatility of printed electronics, industry can consider the implementation of electronics in a way which was never possible before. However, a post-processing step to achieve conductive structures—known as sintering—limits the production ease and speed of printed electronics. This study addresses the issues related to fast sintering without scarifying important properties such as conductivity and surface roughness. A drop-on-demand inkjet printer is employed to deposit silver nanoparticle-based inks. The post-processing time of these inks is reduced by replacing the conventional oven sintering procedure with the state-of-the-art method, named near-infrared sintering. By doing so, the post-processing time shortens from 30–60 min to 6–8 s. Furthermore, the maximum substrate temperature during sintering is reduced from 200 °C to 120 °C. Based on the results of this study, one can conclude that near-infrared sintering is a ready-to-industrialize post-processing method for the production of printed electronics, capable of sintering inks at high speed, low temperature and with low complexity. Furthermore, it becomes clear that ink optimization plays an important role in processing inkjet printable inks, especially after being near-infrared sintered.

An Investigation onto Polydimethylsiloxane (PDMS) Printing Plate of Multiple Functional Solid Line by Flexographic

2013 ◽  
Vol 844 ◽  
pp. 158-161 ◽  
Author(s):  
M.I. Maksud ◽  
Mohd Sallehuddin Yusof ◽  
M. Mahadi Abdul Jamil
Keyword(s):  
Laser Ablation ◽  
Line Width ◽  
High Speed ◽  
Printed Electronics ◽  
Low Cost ◽  
Flexible Substrates ◽  
Large Area ◽  
Printing Plate ◽  
Roll To Roll ◽  
Printing Processes

Recently low cost production is vital to produce printed electronics by roll to roll manufacturing printing process like a flexographic. Flexographic has a high speed technique which commonly used for printing onto large area flexible substrates. However, the minimum feature sizes achieved with roll to roll printing processes, such as flexographic is in the range of fifty microns. The main contribution of this limitation is photopolymer flexographic plate unable to be produced finer micron range due to film that made by Laser Ablation Mask (LAMs) technology not sufficiently robust and consequently at micron ranges line will not be formed on the printing plate. Hence, polydimethylsiloxane (PDMS) is used instead of photopolymer. Printing trial had been conducted and multiple solid lines successfully printed for below fifty microns line width with no interference between two adjacent lines of the printed images.

Development of Silver Nanoparticle Ink for Printed Electronics

2012 ◽  
Vol 2012 (1) ◽  
pp. 000935-000939
Author(s):  
Yiliang Wu ◽  
Ping Liu ◽  
Tony Wigglesworth
Keyword(s):  
Silver Nanoparticles ◽  
Silver Nanoparticle ◽  
Self Assembly ◽  
High Performance ◽  
Printed Electronics ◽  
Low Cost ◽  
High Conductivity ◽  
Large Area ◽  
Electrical Stability ◽  
Nanoparticle Ink

Printable conductors with high conductivity would be critical for low-cost printed electronics. In view of printability, conductivity, and electrical stability, metal such as gold or silver derived from solution-deposited precursor compositions would be an ideal candidate. Xerox has been exploring the use of silver nanoparticles as conductor precursor composition for printed electronics. This paper reviews our research in the development of alkylamine-stabilized silver nanoparticles that can be sintered at low temperature (∼ 120 °C) for high conductivity (>10000 S/cm). Silver nanoparticle ink formulations based on these silver nanoparticles exhibit surface-energy independent printability which enables the fabrication of high-performance top-contact transistor devices, and self-assembly characteristic when printed on hydrophilic substrates which allows for large-area, defect-free source drain arrays to be printed with a narrow and uniform channel length.

Proposal of High-Quality Laser Hardening System for Shaft Parts Using Cylindrical Mirror and Ring-Beam Shaped by High-Speed Laser Scan System

2020 ◽  
Author(s):  
Hirotaka Tanabe ◽  
Keiji Ogawa ◽  
Heisaburo Nakagawa ◽  
Hirohito Tsukada ◽  
Yuki Goto
Keyword(s):  
Heat Treatment ◽  
Laser Beam ◽  
High Speed ◽  
High Efficiency ◽  
High Reliability ◽  
Low Cost ◽  
Treatment Method ◽  
Post Processing ◽  
High Quality ◽  
Almost All

Abstract Shaft parts are important parts used in almost all machines including automobiles. In addition, extremely high reliability is required since a shaft failure is directly linked to a fatal machine trouble. Therefore, a hardening process is usually conducted to improve strength and wear resistance. In this study, we propose a new laser heat treatment method to produce high-quality and high-accuracy shafts with high efficiency, low cost and low environmental impact. We will also develop a technique to derive the appropriate laser irradiation conditions quickly and systematically for shafts with various shapes and dimensions. There are the other hardening techniques including the electric furnace method and the induction method. These methods require post-processing for deformation correction, whereas the proposed method uses a laser to achieve thermal deformation-free hardening, eliminating the need for the post-processing. As a result, an improvement in yield can be expected due to a reduction of the products that cannot be corrected after heat treatment, which had to be waste disposed with conventional methods. By using our method, the entire circumference of the shaft was hardened by using a ring-shaped laser beam and a cylindrical inner mirror. Here, the ring-shaped laser beam was formed by high-speed scanning of a spot shapelaser. In the present paper, the details of this system were introduced and some experimental results were described.

Low-cost, high-speed near-infrared confocal microscope

2019 ◽  
Author(s):  
Cheng Gong ◽  
Nachiket Kulkarni ◽  
Wenbin Zhu ◽  
Christopher David Nguyen ◽  
Clara Curiel-Lewandrowski ◽  
...  
Keyword(s):  
High Speed ◽  
Near Infrared ◽  
Low Cost ◽  
Confocal Microscope

scholarly journals Inkjet Printing of Polyacrylic Acid-Coated Silver Nanoparticle Ink onto Paper with Sub-100 Micron Pixel Size

Materials ◽  
2019 ◽  
Vol 12 (14) ◽  
pp. 2277 ◽  
Author(s):  
Mavuri ◽  
Mayes ◽  
Alexander
Keyword(s):  
High Resolution ◽  
Silver Nanoparticle ◽  
Inkjet Printing ◽  
Polyacrylic Acid ◽  
Room Temperature ◽  
Printed Electronics ◽  
Low Cost ◽  
Electrical Performance ◽  
Print Quality ◽  
Single Pass

Printed electronics (PE) technology shows huge promise for the realisation of low-cost and flexible electronics, with the ability to pattern heat- or pressure-sensitive materials. In future developments of the PE market, the ability to produce highly conductive, high-resolution patterns using low-cost and roll-to-roll processes, such as inkjet printing, is a critical technology component for the fabrication of printed electronics and displays. Here, we demonstrate inkjet printing of polyacrylic acid (PAA) capped silver nanoparticle dispersions onto paper for high-conductivity electronic interconnects. We characterise the resulting print quality, feature geometry and electrical performance of inkjet patterned features and demonstrate the high-resolution printing, sub-100 micron feature size, of silver nanoparticle materials onto flexible paper substrate. Printed onto photo-paper, these materials then undergo chemically triggered sintering on exposure to chloride contained in the paper. We investigated the effect of substrate temperature on the properties of printed silver material from room temperature to 50 °C. At room temperature, the resistivity of single layer printed features, of average thickness of 500 nm and width 85 µm, was found to be 2.17 × 10−7 Ω·m or 13 times resistivity of bulk silver (RBS). The resistivity initially decreased with an increase in material thickness, when achieved by overprinting successive layers or by decreasing print pitch, and a resistivity of around 10 times RBS was observed after overprinting two times at pitch 75 µm and with single pass print pitch of between 60 and 80 µm, resulting in line thickness up to 920 nm. On further increases in thickness the resistivity increased and reached 27 times RBS at print pitch of 15 µm. On moderate heating of the substrate to 50 °C, more compact silver nanoparticle films were formed, reducing thickness to 200 nm from a single pass print, and lower material resistivity approaching five times RBS was achieved.

scholarly journals Low-cost, high-speed near infrared reflectance confocal microscope

2019 ◽  
Vol 10 (7) ◽  
pp. 3497 ◽  
Author(s):  
Cheng Gong ◽  
Nachiket Kulkarni ◽  
Wenbin Zhu ◽  
Christopher David Nguyen ◽  
Clara Curiel-Lewandrowski ◽  
...  
Keyword(s):  
High Speed ◽  
Near Infrared ◽  
Low Cost ◽  
Confocal Microscope ◽  
Infrared Reflectance ◽  
Near Infrared Reflectance

A low‐cost, high‐speed, near‐infrared hygrometer

1995 ◽  
Vol 66 (12) ◽  
pp. 5618-5624 ◽  
Author(s):  
A. C. Wilson ◽  
T. H. Barnes ◽  
P. J. Seakins ◽  
T. G. Rolfe ◽  
E. J. Meyer
Keyword(s):  
High Speed ◽  
Near Infrared ◽  
Low Cost ◽  
Infrared Hygrometer

A Study on Reduction of Processing Time and Improvement of Strength by Using Photopolymer Resin in the 3DP Process

2006 ◽  
Vol 326-328 ◽  
pp. 151-154 ◽  
Author(s):  
Won Hee Lee ◽  
Dong Soo Kim ◽  
Jung Su Kim ◽  
Min Cheol Lee
Keyword(s):  
Processing Time ◽  
Solid Freeform Fabrication ◽  
Low Cost ◽  
Three Dimensional ◽  
Post Processing ◽  
Printing Technology ◽  
Freeform Fabrication ◽  
Post Process ◽  
Curing Method ◽  
Fabrication Time

3DP(three dimensional printing) technology is one of SFF(solid freeform fabrication) technologies which have recently come into a spotlight due to its adaptability to various applications. This technology has a great advantage in terms of short fabrication time for a prototype at a low cost, especially when it comes with multi-nozzle inkjet printing technology. However, it has also a disadvantage since it requires additional curing time, after jetting a binder material, and post-processing time in order to increase the mechanical strength of a product. In this study, a novel 3DP process is proposed to overcome slow solidification and elaborate post-process by adopting photo curing method into the conventional 3DP process. Mechanical properties, such as tensile and bending strengths, of specimens fabricated with the proposed 3DP process were measured and compared with those fabricated with the conventional 3DP process. As a result, it is found that mechanical strengths of specimens from the proposed novel 3DP process show three times higher than those from the conventional 3DP process. Besides, the overall fabrication time with the proposed novel 3DP process is about two times faster than that with the conventional 3DP process, because it does not need additional curing and post-processing time.

The Design of Speed Detector Based on Wireless Sensor Network

2013 ◽  
Vol 457-458 ◽  
pp. 1074-1081
Author(s):  
Xiang Hong Kong ◽  
Yang Xue Guo ◽  
Zhi Fei Hu ◽  
Wei Guo Qian ◽  
Ke Xiang Lu ◽  
...  
Keyword(s):  
Wireless Sensor Network ◽  
Sensor Network ◽  
Transit Time ◽  
High Speed ◽  
Low Cost ◽  
Low Complexity ◽  
Small Error ◽  
Wireless Sensor ◽  
Single Chip ◽  
Ultrasound Velocimetry

An ultrasound velocimetry system based on single-chip CC2530 was designed, this combined the transit-time velocimetry and Doppler velocimetry, achieving the monitoring of wireless sensor network to the speed of the car. The Proteus software simulates the hardware circuits of the ultrasonic transmitter and receiver module. An ultrasound velocimetry system measures high-speed by the ultrasonic Doppler principle, it measures low-speed through the transit-time principle, the speedometer system was verified by the simulation technology. The design has a low complexity, low power, low cost, small error, application and so on.

Design and Implement of a Low Cost Drop-on-Demand Inkjet Printing System

2013 ◽  
Vol 819 ◽  
pp. 317-321
Author(s):  
Zi Yuan Wei ◽  
Sen Yang Wu ◽  
Yong He ◽  
Jian Zhong Fu
Keyword(s):  
Control System ◽  
Inkjet Printing ◽  
High Speed ◽  
Low Cost ◽  
Ccd Camera ◽  
Pressure Control ◽  
Observation System ◽  
Drop On Demand ◽  
Pressure Control System ◽  
Printing System

Nowadays, drop-ondemand inkjet printing technology has shown its potential in many fields. This paper presents designing and implementing of a low cost drop-ondemand inkjet printing system. Inkjet printing system can be divided into four parts, and back pressure control system and droplet observation system are two key components, both of which are described in details. In order to have a further control of accuracy and stability of the system, this paper discusses the parameters designed in the system. In pressure control system, the designed system has higher accuracy compared with the Microfabs product. Images can be taken through CCD camera instead of ultra-high-speed camera by using droplet observation system. Some experiments also have been done to verify the feasibility of the device. Accuracy of pressure control, stability of the system and reproducibility of inkjet process can be verified from the experiment.

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